TerraCycle has a more unusual model. It collects all kinds of hard-to-recycle stuff by mail — drink pouches, candy wrappers, plastic bags, wine corks, toothpaste containers — and then turns them into other things. “In 2011, you’ll see a playground made out of Capri Sun and Honest Kids drink pouches,” said Jo Opot, TerraCycle’s vice president of business development. Consumers who send trash get rewarded with donations to schools or charities, and they get the psychic satisfaction of knowing that something useful was made out of their garbage. You’d think that few people would bother to send their trash in the mail to New Jersey, Terracyle’s home base, but the company says 12 million people have participated, returning 1.8 billion items. The company gets paid by brands whose products it recovers, by manufacturers who buy its materials and by marketers who use its logo on finished products. There’s lots more about how this all works at the TerraCycle website.